A unified procedure is proposed to compute both the stress intensity factor (SIF) and the fatigue crack growth for part-through cracks in complex structural details. This method is an extension of the approximate three-dimensional (3D) weight function (WF) method in solving both SIF and fatigue crack growth problems for complex structural details using only the stress distribution in perspective crack sites. The fatigue crack growth analysis is based on the plastic deformation induced crack closure mechanism which is determined according to the strip yielding method. Cycle-by-cycle fatigue crack growth predictions have been made based on Elber's crack growth relation. The fatigue crack growth analysis is closely related to the cyclic stress experience, the configuration of structural detail, the applied load spectrum and the material property. The advantage and limitation of the method have been discussed. As examples the fatigue crack growth analyses has been demonstrated for the forward fin attachment and the main wing attachment of a Swedish fighter/attacker aircraft (AA7009 L-S/L-T aluminium alloy). This paper shows that an efficient, solid, unified theoretical frame can be stablished for reliable analyses of the fatigue crack growth in complex structural details for general engineering applications.


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    Title :

    Analysing the fatigue crack growth in structural details


    Additional title:

    Analyse des Wachstums eines Ermüdungsrisses in Konstruktionsbauteilen


    Contributors:
    Wang, G.S. (author)

    Published in:

    Publication date :

    1996


    Size :

    17 Seiten, 10 Bilder, 54 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English





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